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| Steiner, Alois; Kopf, Achim J.; Henry, Pierre; Stegmann, Sylvia; Apprioual, Ronan; Pelleau, Pascal. |
| In the landslide-prone area near the Nice international airport, southeastern France, an interdisciplinary approach is applied to develop realistic lithological/geometrical profiles and geotechnical/strength sub-seafloor models. Such models are indispensable for slope stability assessments using limit equilibrium or finite element methods. Regression analyses, based on the undrained shear strength (su) of intact gassy sediments are used to generate a sub-seafloor strength model based on 37 short dynamic and eight long static piezocone penetration tests, and laboratory experiments on one Calypso piston and 10 gravity cores. Significant strength variations were detected when comparing measurements from the shelf and the shelf break, with a significant drop... |
| Tipo: Text |
Palavras-chave: Dynamic penetrometer; Sub-seafloor modeling; Weak zone; Free gas; Numerical slope stability. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00276/38679/37172.pdf |
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| Kopf, Achim J.; Stegmann, Sylvia; Garziglia, Sebastien; Henry, Pierre; Dennielou, Bernard; Haas, Simon; Weber, Kai-christian. |
| Along the Ligurian slope near Nice, southeastern France, a combination of natural and man-made factors govern slope stability, and contributed to a devastating tsunamigenic landslide near Nice airport in 1979. Based on a total of 72 gravity and Kullenberg cores we characterise the architecture and facies of the subbottom sediment. A total of six sedimentary facies types were observed, three of which represent the Pliocene – Holocene background sediment in the wider Nice area while another three are associated with the 1979 landslide and tsunami. The three primary facies types are soft silty clay/clayey silt, somewhat indurated silt/sand interbeds, and Pliocene conglomerates underlying the former. The three other facies are poorly sorted mass wasting... |
| Tipo: Text |
Palavras-chave: Soft sediment deformation; Submarine landslide; Weak zone; Fluidisation. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00343/45397/44894.pdf |
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